21577220696 has 16 divisors (see below), whose sum is σ = 40540370640. Its totient is φ = 10766455200.

The previous prime is 21577220689. The next prime is 21577220719. The reversal of 21577220696 is 69602277512.

It is a self number, because there is not a number n which added to its sum of digits gives 21577220696.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2765255 + ... + 2773046.

It is an arithmetic number, because the mean of its divisors is an integer number (2533773165).

Almost surely, 2^21577220696 is an apocalyptic number.

It is an amenable number.

21577220696 is a deficient number, since it is larger than the sum of its proper divisors (18963149944).

21577220696 is a wasteful number, since it uses less digits than its factorization.

21577220696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5538794 (or 5538790 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 47.

The spelling of 21577220696 in words is "twenty-one billion, five hundred seventy-seven million, two hundred twenty thousand, six hundred ninety-six".